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  #1  
Old 02-28-2011, 11:08 AM
jaydubbz1019 jaydubbz1019 is offline
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Default help!!!

was driving home and my 1999 2500 started to soundlike a deisel and was idling bad got to a stop and engine just died. started it back up and now sounds ok but i keep getting a weird grinding or chattering sound off and on.the idle every once in awhile drops and the truck boggs down and wants to stall. any suggestions on what would cause this
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Old 03-01-2011, 08:08 PM
jaydubbz1019 jaydubbz1019 is offline
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could this be a plenum gasket problem?
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Old 03-01-2011, 09:37 PM
dodgeman9859L dodgeman9859L is offline
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my 98 2500 is doing the same thing andd so is my buddys 98 jeep cherokee with the 5.9l in it. we were both told it was a computer problem. computer would need a reflash but in most cases u would need a new one with a reflash from dodge. was told it would cost me $573 for the computer and another 120 for it to be flashed by dodge. cost might vary but thats wat i was told. good luck.
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Old 03-01-2011, 10:03 PM
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Could be any number of things... computer, injectors, fuel pump, plenum gaskets, sensors...


if it was me, i'd see if fuel pressure is right. if it's solid, even when it dies, then i'd check for gasket leaks. if no obvious problem there, i'd start tapping on different injectors and sensors and see if i could cause the problem to show up. if it's running like crap, take a LONG screwdriver and use it to listen to injectors. sometimes you can hear an injector not "firing". after that.. and i'm typing this while sleepy, time to get the scanner and watch what "things" are doing while it's running both good and bad so i can compare.

just remembered... if you hook up a scanner and it stops "talking" to the ECM and the truck is running like crap, 9 out of 10 times, it's the ecm. she's dying a slow death

good luck getting her gtg.
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Old 03-02-2011, 09:26 AM
mattdott mattdott is offline
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how often do the ecms go out on these trucks. i have the same truck it runs bad at idle ramdomly. no engine light. previous owner removed cat and no light. code scanner always says pass.
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Old 03-02-2011, 10:32 AM
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Quote:
Originally Posted by mattdott View Post
how often do the ecms go out on these trucks. i have the same truck it runs bad at idle ramdomly. no engine light. previous owner removed cat and no light. code scanner always says pass.

not very much considering how many of these trucks were sold back then.
have you looked down into the Intake? make sure there is no oil pooling. also, make sure throttle plates aren't carbon covered. may need a good cleaning. also, check the Idle Air Control (IAC) ports and make sure they are clean. any carbon can slow or impede the IAC from doing it's job - which is to control idle.
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Old 03-02-2011, 11:24 AM
foolioGrimz foolioGrimz is offline
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i ;had an old grand am that sounded like a powerstroke. engine eventually seized up, hopefully its just a computer or other simple problem on urs
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Old 04-10-2011, 06:25 PM
zxbud zxbud is offline
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Quote:
Originally Posted by jaydubbz1019 View Post
was driving home and my 1999 2500 started to soundlike a deisel and was idling bad got to a stop and engine just died. started it back up and now sounds ok but i keep getting a weird grinding or chattering sound off and on.the idle every once in awhile drops and the truck boggs down and wants to stall. any suggestions on what would cause this

Fixed yet? What happened?
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Old 05-22-2011, 11:55 PM
jaydubbz1019 jaydubbz1019 is offline
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put new plenum gasket in and actually tranny started to act up so got that rebuilt. so farproblem is gone.
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